Abstract：
Anaerobic ammonium oxidizing (anammox) bacteria based technologies are widely applied for nitrogen removal from warm (25-40 °C) wastewater with high ammonium concentrations (∼1 gNH4-N L(-1)). Extension of the operational window of this energy and resource efficient process is restricted by the \"supposed\" low growth rate of the responsible microorganisms. Here we demonstrate that the maximum specific growth rate (μ(max)) of anammox bacteria can be increased to a μ(max) value of 0.33 d(-1) by applying a novel selection strategy based on the maximization of the electron transfer capacity in a membrane bioreactor. This value is four times higher than the highest previously reported value. The microbial community was strongly dominated by anammox bacteria closely related (99%) to Candidatus Brocadia sp.40 throughout the experiment. The results described here demonstrate the remarkable capacity of a phylogenetically stable anammox community to adjust its growth rate in response to a change in the cultivation conditions imposed.
摘要：
基于厌氧氨氧化（anammox）细菌的技术广泛应用于高氨浓度（〜1gNH4-NL（-1））的温暖（25-40°C）废水中的氮去除。该能量和资源高效过程的操作窗口的扩展受到负责微生物的“假定”低生长速率的限制。在这里，我们证明了最大的特定生长速率（μ（max））的anammox细菌可以增加到μ（max）值0.33d（-1）通过应用一个新的选择策略的基础上的电子转移能力的最大化膜生物反应器。该值比以前报告的最高值高出四倍。在整个实验中，微生物群落主要由与念珠菌Brocadiasp.40密切相关（99％）的厌氧氨氧化细菌主导。此处描述的结果表明，系统发育稳定的anammox群落具有显着的能力，可以根据所施加的栽培条件的变化来调整其生长速率。
